Support structure for a grill



FIG. 1 is an upper perspective view of the support structure for a grill showing my design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is back elevation view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The grill structure presented in broken lines is for environmental purposes only and forms no part of the claimed design. 

CLAIM The ornamental design for a support structure for a grill, as shown and described. 